Green slimy growth on top of compost in polytunnel

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E Annie B

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I have a new polytunnel and lots of seedlings etc growing well in there now, six weeks after it went up. Several of the seed trays and small pots' surfaces have a thin, dark green, growth on top of the compost. Does this matter at all as it doesn't seem to be doing any harm that I can see? Should I be trying to do something to stop it growing please?

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Yorkie

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Re: Green slimy growth on top of compost in polytunnel
« Reply #1 on: May 10, 2021, 18:47 »
Welcome to the forums  :)

This usually indicates that the compost has been kept too wet - could that be the case?

If so, I'd cut back on the watering and/or ensure that the trays are not stood in water for too long.  Seedlings can be prone to damping off, which is a fungal condition that can be attributed to overwatering.

Are you getting any ventilation into the P/T at all, too?
« Last Edit: May 10, 2021, 18:49 by Yorkie »
I try to take one day at a time, but sometimes several days all attack me at once...

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E Annie B

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Re: Green slimy growth on top of compost in polytunnel
« Reply #2 on: May 10, 2021, 20:54 »
Thanks very much for the welcome and your response - much appreciated. Yes, I could have been over-keen with the watering so I will reduce it and see what happens. I am opening both ends of the tunnel as early as I can each day and closing them early evening. So much to learn but I keep telling myself that I am only practising at the moment. Once I retire from work in a year's time I will have so much more time for it!



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